A5101971303- Advanced Measurement and Metrology Techniques
- Aluminum Alloys Composites Properties
- Aluminum Alloy Microstructure Properties
- Metal and Thin Film Mechanics
- Optical measurement and interference techniques
- Advanced Fiber Laser Technologies
- Microstructure and mechanical properties
- Advanced ceramic materials synthesis
- Photonic and Optical Devices
- Advanced Surface Polishing Techniques
- Biosensors and Analytical Detection
- Advanced biosensing and bioanalysis techniques
- Scientific Measurement and Uncertainty Evaluation
- SARS-CoV-2 detection and testing
- Thermal properties of materials
- Ammonia Synthesis and Nitrogen Reduction
- Orbital Angular Momentum in Optics
- Advanced Decision-Making Techniques
- Optical Systems and Laser Technology
- Advanced Frequency and Time Standards
- Image Processing Techniques and Applications
- Boron and Carbon Nanomaterials Research
- Traffic Prediction and Management Techniques
- Force Microscopy Techniques and Applications
- Hydrogen Storage and Materials
Tsinghua University
2021-2024
National University of Defense Technology
2024
Tsinghua–Berkeley Shenzhen Institute
2024
Institute of New Materials
2022-2023
Guangdong Academy of Sciences
2022-2023
Yanshan University
2023
University Town of Shenzhen
2021-2023
Hefei Institutes of Physical Science
2021
Chinese Academy of Sciences
2021
University of Science and Technology of China
2021
Abstract Catalytic splitting NH 3 to H 2 is one of the foundations for building a carbon‐free energy system but requires catalysts that are highly active and durable at low temperatures. Although various non‐noble have been designed, still operates relatively high temperatures (600–850 °C). Herein, theoretical calculations predict Ni single atoms can change bonding mode NiN from covalent bond ionic boost activity. Further, supported on CeO nanosheets (SA Ni/CeO ) synthesized by sol–gel...
Grating interferometers highly valued for high resolution, straightforward benchmark and insensitivity to environmental disturbances, have become one of the most mainstream methods ultra-precision positioning. Traditional heterodyne grating which use a dual-frequency orthogonally polarized laser source suffer nanometer-level periodic nonlinear error due frequency polarization mixing, thus becoming incompetent undertake sub-nanometer measurement. Based on design two separated beams with small...
It is highly challenging to construct the best SERS hotspots for detection of proteins by surface-enhanced Raman spectroscopy (SERS). Using its own characteristics can achieve effect sensitivity and specificity. In this study, we built a fishing mode device detect receptor-binding domain (RBD) severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) at low concentrations in different environments obtained sensitive signal response. Based on spatial resolution their protein-specific...
The design, fabrication, and demonstration of a planar two-dimensional-crossed reflective diffractive grating are proposed to construct novel optical configuration, the best our knowledge, potentially applied for atom cooling trapping in magneto-optical trap. Based on single-beam single-exposure scheme by means an orthogonal two-axis Lloyd's mirrors interferometer, we rapidly patterned ∼1µm period capable providing uniform intensity diffracted beams. key structural parameters including array...
A hybrid strategy is proposed to meet the challenge of obtaining profile micro gear teeth with a small modulus. Firstly, contact probe segmentally obtained falling flank profiles an auxiliary lifting mechanism avoid interference when it climbs on rising slope. Then, noncontact chromatic confocal displacement sensor efficiently acquired peak positions carry out two-point error separation from measurement. Finally, actual experiments were carried obtain harmonic drive flexspline. Compared...
LED filament lamp has the characteristics of nearly 360° lighting angle, high brightness, and low energy consumption, turning it gradually into best substitute for traditional incandescent lamps. At present, due to limitations heat dissipation, development high-power is restricted. Helium a rare gas with small density transfer coefficient. It can be used as cooling protective lamp. In this paper, we investigated effects helium on dissipation luminescence performance A60 lamps by detecting...
Laser power stabilization plays a significant role in atomic and molecular physics, quantum precision measurement, optical sensing measurement. In the classical method of using feedback control loop to stabilize laser power, beam splitter is conjunction element connect inside output outside loop. The stability its split ratio will directly affect result stabilization, especially demand high ratios for high-efficiency output. For compatibility power-stabilized system, we designed manufactured...
As a fundamental geometric indicator, high precision roundness measurement is the basis evaluation index of cylindrical or spherical parts. In most measurements, rotation platforms are used to bring certain error result. Two-probe method typical strategy with separation technique, coming from three-probe low cost, online integration, flexible installation, etc. We developed system three chromatic confocal displacement sensors flexibility and axial-resolution. start, two sets data achieved...
This paper presents a novel heterodyne grating interferometer designed to meet the precise measurement requirements of next-generation lithography systems and large-scale atomic-level manufacturing. Utilizing dual-frequency light source, enables simultaneous three degrees freedom. Key advancements include compact zero Dead-Zone optical path configuration, significantly enhancing reliability by mitigating impact source fluctuations air refractive index variations. A comprehensive crosstalk...
Heterodyne grating interferometer is widely used in precision positioning due to its high and robustness. However, the polarization states of two frequency components a dual-frequency laser are easy overlap with each other because non-ideality optical components. It will cause nonlinear error, which limits measurement interferometer. To improve aliasing heterodyne interferometer, adjustment module proposed adjust angle laser. The dual system outputs beams different frequencies separately....
Trumpet interchange is one of the most common types in four-lane freeway and it critical to organize traffic effectively during reconstruction it. The difficulties key issues organization expansion project trumpet interchanges can be found out by analyzing layout ramps, characteristics, schemes main construction technologies. Based on idea all ramps unimpeded, general principles methods are put forward considering volumes, design proposals period. Hohhot-Baotou analyzed, which may provide a...
Boron (B) is an effective grain refiner in Al-Si alloys, but the modification mechanism of B on formation and solidification behaviour Fe-rich phases still debate. In this paper, we used situ synchrotron X-ray radiography, combined with thermodynamics first-principles calculations, to study influence evolution microstructure Al-7Si-xFe (x=1.2~3.0) alloys. The results showed that had excellent refinement α-Al grains Al-7Si-1.2Fe it no obvious effect morphology distribution due eutectic...